Manufacture of blacksmiths  swages



UNITED STATES PATENT OFFICE.

JAMES F. DUFFY, OF CHICAGO, ILLINOIS.

MANUFACTURE o-F BLAcKsMlTi-ls swAGEs.

SPECIFICATION forming part of Letters Patent No. 259,113, dated June 6, 1882.

- Application mea December s1, 1881. (N man.)

To all whom it may concern Be it known that I, JAMES F. DUFFY, o Chicago, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in the Manufacture of Black-- smiths Swages; and I do hereby declare that the following is afull, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, -and to letters of reference marked thereon, which form apart of this specification.

Heretofore it has been the custom to make blacksmithsswages by hand, by which method even the exercise of the greatest care isincapable of producing' a uniformly good tool, for a defective blow of the striker on the top tool or an unsteady hand of the blacksmith when holding the fuller77 is likely to throw the tool being made out of balancethat is, make it out of proportion and dest-roy its symmetry of form, or make the groove in the operating-face of the said tool run obliquely instead ot' centrally and longitudinally, as it should be. My method overcomes these difculties by making swages in one heat with dies inserted in the ram of a powerpress or hammer of a drophammer. Its object is, rst, to make a swage or anygiven number of swages perfect and uniform in construction, having the semicircular groove runnin g lon gitudinally and central, and having the proportion or balance of metal in all parts equal and perfect; second, to save labor, the estimated saving of which is as one to twelve, (1 to 12 5) third, to save material, no waste being necessary and little, if any, oxidation happening; and, fourth, to preserve the quality of the steel by completing the swage in one heat instead of a number of heats, as heretofore, which materially deteriorates the quality of said steel.

Similar letters of reference represent like parts in the several figures of the drawings, in which- Figurel shows the construction and arrangements of the dies in the head-block. Fig. 2 is a perspective view of a blacksmiths swage,`

and Fig. 3 is a plan view of the same.

In the drawings, A represents a swage of the usual construction in current use among blacksmiths. It is provided with a tang, a, which is inserted in an anvil, and in its operatingface is a groove, a', semicircular in cross-section, which should run longitudinally in the center of width of the swage. This, however, is seldom the case, for when made by handand applicant knows of no other method heretofore employed-it is almost impossible to make an absolutely perfect swage. The swage commonly made is somewhat distorted in the shape, as shown in dotted lines in Fig. 3, the groove either being oblique or more metal being on one sideof the groove than on the other, throwing the swage, practically speaking, outot' balance.

To make swages by my'method I place side by side a die, B, for forming the operatingface of the swage and a plane-faced die, (l, for drawing out the tang. Both of these dies have tan gs b and c, which enter corresponding sockets or holes in the head-block D, being secured therein by set-screws or keys b' and o. The head-block D is provided with a Vcylindrical tang, d, by means of which it is secured in the ram of a power-press or hammer of a steam or drop hammer. In making the swages the tang is first drawn out by the plane-faced die C, after which the face of the swage is formed by the die B, said die consisting of a depression havin g beveled walls and an operating-face provided with a ridge semicircular in cross-section and running centrally and longitudinally over said face. In order that the under side of the swage may have a solid bearing when used in an anvil, and that the tang of said swage may not be injured when the operating-face of the same is being made, I make a hole or depression, e, in the anvil or base E, corresponding in dimensions to the tang of the swage. Thus the same blow which forms the operating-face of the -swage contributes to make the under side of the head of said swage perfectly plane, so as to bear flat on the face of the anvil.

What has-been said concerning the manufacture of thebottom tool is equally applicable to the upper tool, the manufacture of both being considered within the scope of my invention.

The above-described method enables me to do in one heat what has heretofore required a dozen heats, thus not only saving the metal IOO 9. 25min:

from scaling or oxidation, but preserving the tang oi' n swage, and located immediately unquality of the steel. der the center of said die, substantially as and What I claim as new, and desire to secure by for the purpose heronbefore described and set; Letters Patent, isforth. 15

5 A die for forming blneksmithsswoges, haw In testimony that; I claim the foregoing as ing ai depression in its face consisting,r of side my own I hereby aiix my signature in presbeveled Walls,n plane operating-inne, and o ence oi'two witnesses.

ridge semieircularin cross-section running cen- J AMES F. DUFFY. orally and longitudinally over said operating Witnesses:- 1o face, in combination with an anvil or base liav- JAMES H. COYNE,

ing a hole or depression corresponding to tho FRANK D. THOMASON. 

